一个小型的无电池生物电子植入器,使用一个磁电转换器用于无线供电和PWM反射传播
IEEE transactions on biomedical circuits and systems
|September 25, 2024
概括
这项研究引入了一种新的脉冲宽度调制 (PWM) 磁电 (ME) 背散器上链,用于无线生物电子植入物,利用开关电容器能量提取 (SCEE) 进行高效,低功耗的通信. 该系统实现了高数据速率和低位错误率,从而实现了连续的神经记录.
科学领域:
- 生物电子工程 生物电子工程
- 无线电力传输是无线电力传输.
- 可以植入的医疗器械
背景情况:
- 无线微创生物电子植入物对于医疗保健和研究至关重要.
- 磁电 (ME) 无线电力传输 (WPT) 为生物植入物提供高效,安全和耐失调的电力.
- 使用ME WPT的低功耗,高质量的上链通信仍然是一个重大挑战.
研究的目的:
- 开发一个脉冲宽度调制 (PWM) 的ME反分散上链通信系统.
- 为生物电子植入物提供高效,低功耗的上链通信.
- 为了证明连续的无线神经记录能力.
主要方法:
- 实施了开关电容器能量提取 (SCEE) 技术,用于ME传感器中的快速能量消耗.
- 在ME中通过利用传感器的回响周期来启用时间域PWM反向散射.
- 开发了高级ME传感器建模用于设计和分析,通过测量验证.
主要成果:
- 在使用SCEE的2个ME周期内实现了50%的振幅减小.
- 展示了一个PWM ME反向散射上链,数据速率为17.73 kbps,效率为0.9 pJ/bit.
- 在5厘米处使用轻量级多层感知 (MLP) 解码算法实现了8.5 x 10-5位误差率 (BER).
结论:
- 拟议的SCEE技术有效地为ME回散系统提供低功耗,高质量的上链通信.
- 毫米级的集成系统芯片 (SoC) 植入物和便携式收发器可促进双向通信.
- 在体外设置中成功证明了连续的无线神经局部场潜力 (LFP) 记录.
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